The modifications suggested for the 2010 update to ASHRAE’s Standard 90.1 cover air leakage, day lighting and efficiency issues.

ASHRAE is suggesting 21 changes to its best-known energy-efficiency standard, and wants the public’s input on them.

The changes suggested for the 2010 update to ASHRAE’s Standard 90.1, “Energy Standard for Buildings Except Low-Rise Residential Buildings,” cover air leakage, day lighting and efficiency issues.

“Our goal is to produce a standard to increase energy efficiency in buildings,” said Mick Schwedler, the standard committee chairman.  “Public input from the industry into development of the standard has proven invaluable since it was first published 35 years ago.”

Officials with the American Society of Heating, Refrigerating and Air-Conditioning Engineers said that if no comments are received between now and April 4, the changes will be put in the standard this fall.

For a look at the propose changes or to comment, visitthis Web site .

The voluntary standard is typically incorporated into state, local and national building codes. Its provisions cover most structures erected in the United States and around the world.